A bubble type shape was seen by many sitting in the sky above Phoenix today. It reflected the light from the sun and was gone with nighfall. There was either a 2nd above Sedona, AZ or it moved. The Federal Aviation Administration said the object appears to be a balloon. It was not showing up on FAA radar, which Gregor said could mean it is a small, non-metallic object. National Weather Service officials said that the object is not one of the agency's weather balloons.